Function xcb::ffi::base::xcb_prefetch_extension_data

pub unsafe extern "C" fn xcb_prefetch_extension_data(
    c: *mut xcb_connection_t, 
    ext: *mut xcb_extension_t
)

Prefetch of extension data into the extension cache

This function allows a “prefetch” of extension data into the extension cache. Invoking the function may cause a call to xcb_query_extension, but will not block waiting for the reply. xcb_get_extension_data will return the prefetched data after possibly blocking while it is retrieved.